“All That” alum Christy Knowings died Tuesday after suffering an asthma attack that left her with brain damage. She was 46. The Nickelodeon star was hospitalized on Friday after the attack, and placed on life support, TMZ reported. She remained in that state through Tuesday, when her family ultimately decided to take her off it. Knowings was a regular on “All That” for three seasons from 1997 to 2000 alongside Amanda Bynes, Nick Cannon, Kenan Thompson and more. She played various roles on the comedy series, including Jessica and Penny Lane. However, Knowings’ favorite role was as Gloria Bankhead in Season 6. “She was an over-the-top Martha…
